Composition for rendering paper transparent and method of making same



STATES PATENT OFFICE...

SAMUEL H. PARRISH, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF T0 LESLIE C.

OER/ELL, OF CHICAGO, ILLINOIS.

COMPOSITION FOR RENDERING- PAPER TRANSPABENUZ AND METHOD OF MAKING- SAME.

No Drawing.

Toallwlwmitmay concern:

Be it known that I, SAMUEL H. PARRISH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Compositions for Bendering Paper Transparent and Methods of Making Same, of which the following is a specification. f

It is the object of my invention to produce a paper which is very transparent without injuriously affecting the color or other qualities of the paper such as its flexibility and strength, and to produce a treated paper with a superior finish and high gloss, and the surface of which is dry and free from the stickiness which is characteristic of paper treated by previously known processes and compositions for the purpose of making it transparent. My invention is applicable to papers generally but is most effective when applied to a thin or medium thin paper of fine texture or fiber.

In making up the improved composition for treating the paper I preferably make two distinct mixtures which are subsequently put to ether to form the completed compositlon. ne of these mixtures consists of equal parts of rosin, which may be ordinary commercial rosin of good quality, carbon tetrachloride and alcohol which may be ordinary denatured grain or ethyl alcohol. In forming this mixture I referably first dissolve the rosin in the car on tetrachloride and after the solution is complete add the alcohol thereto.

The other component mixture consists of equal quantities'of fir balsam, preferably Canadian or Oregon balsam, oil of turpentine and spirits of turpentine to which is preferably added a small amount of'scented oil such as oil of citronella or nutmeg oil. Preferably the balsam is first dissolved in the oil of turpentine and then the other ingredients addedafter the solution is complete. For the spirits of turpentine an additional portion of oil of turpentine can be substituted.

After the two component portions are Specification of Letters Patent." Patented June 13, 1922.

Application filed June 6, 1919. Serial No. 302,219.

portion of one of the solution containing the rosin to six of the solution containing the balsam. After the mixture is thoroughly stirred it is ready for application to the paper, and it is preferably applied by a brush or roller.

While the above proportions and materials are preferred by me it is obvious that known equivalent .materials may be employed and the proportions stated varied within considerable limits without departing from my invention.

I claim:

1. A liquid for rendering paper transparent comprising fir balsam, rosin and a solvent thereof.

2. A liquid for rendering paper transparent comprising fir balsam, turpentine, rosin and a solvent of balsam.

3. A liquid for rendering paper transparent comprising fir balsam, rosin, turpentine ing a solution of balsam in equal part of oil of turpentine, adding an equal part of spirits of turpentine, dissolving rosin in carbon tetrachloride, adding alcohol thereto and mixing the resultant solutions.

7. A composition for rendering paper transparent comprising six parts of balsam, six parts of oil of turpentine, six parts of spirits of turpentine, one part of rosin, one part of alcohol and one part of carbon tetrachloride.

8. A composition for rendering paper transparent comprising fir balsam, rosin, tu'pentine, alcohol and carbon tetrachlon e.

SAMUEL H. PARRISH. 

